One‐Pot hydrothermal synthesis of 1D copper (II) coordination polymers involving in-situ decarboxylation

• Published in: Solid state sciences 2019-10, Vol.96, p.105958, Article 105958
• Main Authors: Ay, Burak, Şahin, Onur, Yildiz, Emel
• Format: Article
• Language: English
• Subjects: Coordination polymers; Electrical conductivity; Hydrothermal synthesis; In-situ decarboxylation; Luminescence
• ISSN: 1293-2558; 1873-3085
• DOI: 10.1016/j.solidstatesciences.2019.105958

One-Dimensional Copper(II) coordination polymers with the formula [Cu(2-pyc)2]n.nH2O (1) (2-Hpyc: Picolinic acid) and [Cu(1,10-phen)(SO4)(H2O)2]n(2) (1,10-phen: 1,10-phenanthroline) have been co-synthesized under hydrothermal conditions in the same medium. The coordination polymers characterized by elemental analysis, FT-IR spectroscopy, TG analysis, ICP-OES, PXRD and single crystal X-ray diffraction. The compound 1 crystallizes in triclinic system, space group P-1, the compound 2 crystallizes in monoclinic system, space group C2/c. In 1, the Cu(II) ions are further joined by picolinic acid ligands, generating 1D coordination polymer running parallel to the [100] direction, while the Cu(II) ions are further joined by sulfate ligands, generating 1D coordination polymer running parallel to the [001] direction in 2. Notably, the 2-Hpyc ligand is in situ generated by decarboxylation of the 2,6-pyridinedicarboxylic (2,6-pydc) acid ligand under hydrothermal conditions. Thermal stability, luminescence and electrical conductivity properties of 1 and 2 have been investigated. One-Dimensional Copper(II) coordination polymers with the formula [Cu(2-pyc)2]n.nH2O (1) (2-Hpyc: Picolinic acid) and [Cu(1,10-phen)(SO4)(H2O)2]n (2) (1,10-phen: 1,10-phenanthroline have been co-synthesized under hydrothermal conditions in the same medium. CPs present the first example of in-situ semi-decarboxylation, and co-synthesized in the {Cu/2,6-pydc/1,10-phen} system. [Display omitted] •1D Copper(II) coordination polymers with the formula [Cu(2-pyc)2]n.nH2O (1) (2-Hpyc: Picolinic acid) and [Cu(1,10-phen)(SO4)(H2O)2]n (2) (1,10-phen: 1,10-phenanthroline) have been co-synthesized under hydrothermal conditions in the same medium.•The synthesized coordination polymers can be used as semiconducting materials in solid phase form.